Re: Joins and full index scans...mysql vs postgres?

workmem is set to the default, increasing it decreases performance.

> Does this work:
>
> "Merge Left Join (cost=0.00..2656.36 rows=6528 width=1522) (actual
> time=0.057..123.659 rows=6528 loops=1)"
> " Merge Cond: ("outer".uid = "inner".uid)"
> " -> Merge Left Join (cost=0.00..1693.09 rows=6528 width=1264)
> (actual time=0.030..58.876 rows=6528 loops=1)"
> " Merge Cond: ("outer".uid = "inner".user_id)"
> " -> Index Scan using users_pkey on users (cost=0.00..763.81
> rows=6528 width=100) (actual time=0.016..9.446 rows=6528 loops=1)"
> " -> Index Scan using phorum_users_base_pkey on
> phorum_users_base (cost=0.00..822.92 rows=9902 width=1168) (actual
> time=0.007..15.674 rows=9845 loops=1)"
> " -> Index Scan using useraux_pkey on useraux (cost=0.00..846.40
> rows=7582 width=262) (actual time=0.007..11.935 rows=7529 loops=1)"
> "Total runtime: 127.442 ms"
>
>
> > On Wed, Feb 22, 2006 at 12:26:47PM -0500, ryan groth wrote:
> > > Postgres Explain
> >
> > We need to see EXPLAIN ANALYZE results here.
> >
> > What's your work_mem set to?
> >
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>
> > On Wed, Feb 22, 2006 at 12:26:47PM -0500, ryan groth wrote:
> > > Postgres Explain
> >
> > We need to see EXPLAIN ANALYZE results here.
> >
> > What's your work_mem set to?
> >
> > /* Steinar */
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> > Homepage: http://www.sesse.net/
> >
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> > TIP 3: Have you checked our extensive FAQ?
> >
> > http://www.postgresql.org/docs/faq
> >
> >
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